I'm so sorry that you lost your rabbit and that your other one isn't doing well. Don't beat yourself up. Regular worming really isn't a normal thing to do with rabbits, and isn't even usually recommended. Rabbits can be affected be certain worms, but very often it doesn't become an issue, so that's why regular worming isn't usually done like it is with cats and dogs, but is instead just treated if evidence of a parasite burden is present. Is there a reason your vet believes that it is worms that affected both of your rabbits? Was evidence found in a fecal test or other test?
I'm glad Kick is improving and hope that he will be back home with you soon.
I'm glad Kick is improving and hope that he will be back home with you soon.